Init with some changes to the Serif Theme

_sass/libraries/hamburgers/_base.scss

@@ -0,0 +1,88 @@
+// Hamburger
+// ==================================================
+@use "sass:math";
+
+.hamburger {
+  padding: $hamburger-padding-y $hamburger-padding-x;
+  display: inline-block;
+  cursor: pointer;
+
+  transition-property: opacity, filter;
+  transition-duration: 0.15s;
+  transition-timing-function: linear;
+
+  // Normalize (<button>)
+  font: inherit;
+  color: inherit;
+  text-transform: none;
+  background-color: transparent;
+  border: 0;
+  margin: 0;
+  overflow: visible;
+
+  &:hover {
+    @if $hamburger-hover-use-filter == true {
+      filter: $hamburger-hover-filter;
+    }
+    @else {
+      opacity: $hamburger-hover-opacity;
+    }
+  }
+
+  &.is-active {
+    &:hover {
+      @if $hamburger-hover-use-filter == true {
+        filter: $hamburger-active-hover-filter;
+      }
+      @else {
+        opacity: $hamburger-active-hover-opacity;
+      }
+    }
+
+    .hamburger-inner,
+    .hamburger-inner::before,
+    .hamburger-inner::after {
+      background-color: $hamburger-active-layer-color;
+    }
+  }
+}
+
+.hamburger-box {
+  width: $hamburger-layer-width;
+  height: $hamburger-layer-height * 3 + $hamburger-layer-spacing * 2;
+  display: inline-block;
+  position: relative;
+}
+
+.hamburger-inner {
+  display: block;
+  top: 50%;
+  margin-top: math.div($hamburger-layer-height, -2);
+
+  &,
+  &::before,
+  &::after {
+    width: $hamburger-layer-width;
+    height: $hamburger-layer-height;
+    background-color: $hamburger-layer-color;
+    border-radius: $hamburger-layer-border-radius;
+    position: absolute;
+    transition-property: transform;
+    transition-duration: 0.15s;
+    transition-timing-function: ease;
+  }
+
+  &::before,
+  &::after {
+    content: "";
+    display: block;
+  }
+
+  &::before {
+    top: ($hamburger-layer-spacing + $hamburger-layer-height) * -1;
+  }
+
+  &::after {
+    bottom: ($hamburger-layer-spacing + $hamburger-layer-height) * -1;
+  }
+}

_sass/libraries/hamburgers/hamburgers.scss

@@ -0,0 +1,118 @@
+@charset "UTF-8";
+/*!
+ * Hamburgers
+ * @description Tasty CSS-animated hamburgers
+ * @author Jonathan Suh @jonsuh
+ * @site https://jonsuh.com/hamburgers
+ * @link https://github.com/jonsuh/hamburgers
+ */
+
+// Settings
+// ==================================================
+$hamburger-padding-x: 15px !default;
+$hamburger-padding-y: 15px !default;
+$hamburger-layer-width: 36px;
+$hamburger-layer-height: 3px !default;
+$hamburger-layer-spacing: 7px;
+$hamburger-layer-color: $primary !default;
+$hamburger-layer-border-radius: 3px !default;
+$hamburger-hover-opacity: 0.7 !default;
+$hamburger-active-layer-color: #fff !default;
+$hamburger-active-hover-opacity: $hamburger-hover-opacity !default;
+
+// To use CSS filters as the hover effect instead of opacity,
+// set $hamburger-hover-use-filter as true and
+// change the value of $hamburger-hover-filter accordingly.
+$hamburger-hover-use-filter: false !default;
+$hamburger-hover-filter: opacity(50%) !default;
+$hamburger-active-hover-filter: $hamburger-hover-filter !default;
+
+// Types (Remove or comment out what you don’t need)
+// ==================================================
+$hamburger-types: (
+  3dx,
+  3dx-r,
+  3dy,
+  3dy-r,
+  3dxy,
+  3dxy-r,
+  arrow,
+  arrow-r,
+  arrowalt,
+  arrowalt-r,
+  arrowturn,
+  arrowturn-r,
+  boring,
+  collapse,
+  collapse-r,
+  elastic,
+  elastic-r,
+  emphatic,
+  emphatic-r,
+  minus,
+  slider,
+  slider-r,
+  spin,
+  spin-r,
+  spring,
+  spring-r,
+  stand,
+  stand-r,
+  squeeze,
+  vortex,
+  vortex-r
+) !default;
+
+// Base Hamburger (We need this)
+// ==================================================
+@import 'base';
+
+// Hamburger types
+// ==================================================
+// @import "types/3dx";
+// @import "types/3dx-r";
+// @import "types/3dy";
+// @import "types/3dy-r";
+// @import "types/3dxy";
+// @import "types/3dxy-r";
+// @import "types/arrow";
+// @import "types/arrow-r";
+// @import "types/arrowalt";
+// @import "types/arrowalt-r";
+// @import "types/arrowturn";
+// @import "types/arrowturn-r";
+// @import "types/boring";
+// @import "types/collapse";
+// @import "types/collapse-r";
+// @import "types/elastic";
+// @import "types/elastic-r";
+// @import "types/emphatic";
+// @import "types/emphatic-r";
+// @import "types/minus";
+@import 'types/slider';
+// @import "types/slider-r";
+// @import "types/spin";
+// @import "types/spin-r";
+// @import "types/spring";
+// @import "types/spring-r";
+// @import "types/stand";
+// @import "types/stand-r";
+// @import "types/squeeze";
+// @import "types/vortex";
+// @import "types/vortex-r";
+
+// ==================================================
+// Cooking up additional types:
+//
+// The Sass for each hamburger type should be nested
+// inside an @if directive to check whether or not
+// it exists in $hamburger-types so only the CSS for
+// included types are generated.
+//
+// e.g. hamburgers/types/_new-type.scss
+//
+// @if index($hamburger-types, new-type) {
+//   .hamburger--new-type {
+//     ...
+//   }
+// }

_sass/libraries/hamburgers/types/_3dx-r.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dx-r) {
+  /*
+   * 3DX Reverse
+   */
+  .hamburger--3dx-r {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateY(-180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_3dx.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dx) {
+  /*
+   * 3DX
+   */
+  .hamburger--3dx {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateY(180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_3dxy-r.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dxy-r) {
+  /*
+   * 3DXY Reverse
+   */
+  .hamburger--3dxy-r {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateX(180deg) rotateY(180deg) rotateZ(-180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_3dxy.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dxy) {
+  /*
+   * 3DXY
+   */
+  .hamburger--3dxy {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateX(180deg) rotateY(180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_3dy-r.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dy-r) {
+  /*
+   * 3DY Reverse
+   */
+  .hamburger--3dy-r {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateX(180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_3dy.scss

@@ -0,0 +1,35 @@
+@if index($hamburger-types, 3dy) {
+  /*
+   * 3DY
+   */
+  .hamburger--3dy {
+    .hamburger-box {
+      perspective: $hamburger-layer-width * 2;
+    }
+
+    .hamburger-inner {
+      transition: transform 0.15s cubic-bezier(0.645, 0.045, 0.355, 1),
+                  background-color 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+
+      &::before,
+      &::after {
+        transition: transform 0s 0.1s cubic-bezier(0.645, 0.045, 0.355, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        background-color: transparent !important;
+        transform: rotateX(-180deg);
+
+        &::before {
+          transform: translate3d(0, $hamburger-layer-height + $hamburger-layer-spacing, 0) rotate(45deg);
+        }
+
+        &::after {
+          transform: translate3d(0, ($hamburger-layer-height + $hamburger-layer-spacing) * -1, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrow-r.scss

@@ -0,0 +1,16 @@
+@if index($hamburger-types, arrow-r) {
+  /*
+   * Arrow Right
+   */
+  .hamburger--arrow-r.is-active {
+    .hamburger-inner {
+      &::before {
+        transform: translate3d($hamburger-layer-width * 0.2, 0, 0) rotate(45deg) scale(0.7, 1);
+      }
+
+      &::after {
+        transform: translate3d($hamburger-layer-width * 0.2, 0, 0) rotate(-45deg) scale(0.7, 1);
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrow.scss

@@ -0,0 +1,16 @@
+@if index($hamburger-types, arrow) {
+  /*
+   * Arrow
+   */
+  .hamburger--arrow.is-active {
+    .hamburger-inner {
+      &::before {
+        transform: translate3d($hamburger-layer-width * -0.2, 0, 0) rotate(-45deg) scale(0.7, 1);
+      }
+
+      &::after {
+        transform: translate3d($hamburger-layer-width * -0.2, 0, 0) rotate(45deg) scale(0.7, 1);
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrowalt-r.scss

@@ -0,0 +1,36 @@
+@if index($hamburger-types, arrowalt-r) {
+  /*
+   * Arrow Alt Right
+   */
+  .hamburger--arrowalt-r {
+    .hamburger-inner {
+      &::before {
+        transition: top 0.1s 0.1s ease,
+                    transform 0.1s cubic-bezier(0.165, 0.84, 0.44, 1);
+      }
+
+      &::after {
+        transition: bottom 0.1s 0.1s ease,
+                    transform 0.1s cubic-bezier(0.165, 0.84, 0.44, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        &::before {
+          top: 0;
+          transform: translate3d($hamburger-layer-width * 0.2, $hamburger-layer-width * -0.25, 0) rotate(45deg) scale(0.7, 1);
+          transition: top 0.1s ease,
+                      transform 0.1s 0.1s cubic-bezier(0.895, 0.03, 0.685, 0.22);
+        }
+
+        &::after {
+          bottom: 0;
+          transform: translate3d($hamburger-layer-width * 0.2, $hamburger-layer-width * 0.25, 0) rotate(-45deg) scale(0.7, 1);
+          transition: bottom 0.1s ease,
+                      transform 0.1s 0.1s cubic-bezier(0.895, 0.03, 0.685, 0.22);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrowalt.scss

@@ -0,0 +1,36 @@
+@if index($hamburger-types, arrowalt) {
+  /*
+   * Arrow Alt
+   */
+  .hamburger--arrowalt {
+    .hamburger-inner {
+      &::before {
+        transition: top 0.1s 0.1s ease,
+                    transform 0.1s cubic-bezier(0.165, 0.84, 0.44, 1);
+      }
+
+      &::after {
+        transition: bottom 0.1s 0.1s ease,
+                    transform 0.1s cubic-bezier(0.165, 0.84, 0.44, 1);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        &::before {
+          top: 0;
+          transform: translate3d($hamburger-layer-width * -0.2, $hamburger-layer-width * -0.25, 0) rotate(-45deg) scale(0.7, 1);
+          transition: top 0.1s ease,
+                      transform 0.1s 0.1s cubic-bezier(0.895, 0.03, 0.685, 0.22);
+        }
+
+        &::after {
+          bottom: 0;
+          transform: translate3d($hamburger-layer-width * -0.2, $hamburger-layer-width * 0.25, 0) rotate(45deg) scale(0.7, 1);
+          transition: bottom 0.1s ease,
+                      transform 0.1s 0.1s cubic-bezier(0.895, 0.03, 0.685, 0.22);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrowturn-r.scss

@@ -0,0 +1,18 @@
+@if index($hamburger-types, arrowturn-r) {
+  /*
+   * Arrow Turn Right
+   */
+  .hamburger--arrowturn-r.is-active {
+    .hamburger-inner {
+      transform: rotate(-180deg);
+
+      &::before {
+        transform: translate3d(-8px, 0, 0) rotate(-45deg) scale(0.7, 1);
+      }
+
+      &::after {
+        transform: translate3d(-8px, 0, 0) rotate(45deg) scale(0.7, 1);
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_arrowturn.scss

@@ -0,0 +1,18 @@
+@if index($hamburger-types, arrowturn) {
+  /*
+   * Arrow Turn
+   */
+  .hamburger--arrowturn.is-active {
+    .hamburger-inner {
+      transform: rotate(-180deg);
+
+      &::before {
+        transform: translate3d(8px, 0, 0) rotate(45deg) scale(0.7, 1);
+      }
+
+      &::after {
+        transform: translate3d(8px, 0, 0) rotate(-45deg) scale(0.7, 1);
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_boring.scss

@@ -0,0 +1,30 @@
+@if index($hamburger-types, boring) {
+  /*
+   * Boring
+   */
+  .hamburger--boring {
+    .hamburger-inner {
+      &,
+      &::before,
+      &::after {
+        transition-property: none;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(45deg);
+
+        &::before {
+          top: 0;
+          opacity: 0;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(-90deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_collapse-r.scss

@@ -0,0 +1,47 @@
+@if index($hamburger-types, collapse-r) {
+  /*
+   * Collapse Reverse
+   */
+  .hamburger--collapse-r {
+    .hamburger-inner {
+      top: auto;
+      bottom: 0;
+      transition-duration: 0.13s;
+      transition-delay: 0.13s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::after {
+        top: ($hamburger-layer-spacing * 2 + $hamburger-layer-height * 2) * -1;
+        transition: top 0.2s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    opacity 0.1s linear;
+      }
+
+      &::before {
+        transition: top 0.12s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    transform 0.13s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: translate3d(0, ($hamburger-layer-spacing + $hamburger-layer-height) * -1, 0) rotate(45deg);
+        transition-delay: 0.22s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::after {
+          top: 0;
+          opacity: 0;
+          transition: top 0.2s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      opacity 0.1s 0.22s linear;
+        }
+
+        &::before {
+          top: 0;
+          transform: rotate(90deg);
+          transition: top 0.1s 0.16s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      transform 0.13s 0.25s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_collapse.scss

@@ -0,0 +1,47 @@
+@if index($hamburger-types, collapse) {
+  /*
+   * Collapse
+   */
+  .hamburger--collapse {
+    .hamburger-inner {
+      top: auto;
+      bottom: 0;
+      transition-duration: 0.13s;
+      transition-delay: 0.13s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::after {
+        top: ($hamburger-layer-spacing * 2 + $hamburger-layer-height * 2) * -1;
+        transition: top 0.2s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    opacity 0.1s linear;
+      }
+
+      &::before {
+        transition: top 0.12s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    transform 0.13s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: translate3d(0, ($hamburger-layer-spacing + $hamburger-layer-height) * -1, 0) rotate(-45deg);
+        transition-delay: 0.22s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::after {
+          top: 0;
+          opacity: 0;
+          transition: top 0.2s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      opacity 0.1s 0.22s linear;
+        }
+
+        &::before {
+          top: 0;
+          transform: rotate(-90deg);
+          transition: top 0.1s 0.16s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      transform 0.13s 0.25s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_elastic-r.scss

@@ -0,0 +1,41 @@
+@if index($hamburger-types, elastic-r) {
+  /*
+   * Elastic Reverse
+   */
+  .hamburger--elastic-r {
+    .hamburger-inner {
+      top: $hamburger-layer-height / 2;
+      transition-duration: 0.275s;
+      transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
+
+      &::before {
+        top: $hamburger-layer-height + $hamburger-layer-spacing;
+        transition: opacity 0.125s 0.275s ease;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height * 2) + ($hamburger-layer-spacing * 2);
+        transition: transform 0.275s cubic-bezier(0.68, -0.55, 0.265, 1.55);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        $y-offset: $hamburger-layer-spacing + $hamburger-layer-height;
+
+        transform: translate3d(0, $y-offset, 0) rotate(-135deg);
+        transition-delay: 0.075s;
+
+        &::before {
+          transition-delay: 0s;
+          opacity: 0;
+        }
+
+        &::after {
+          transform: translate3d(0, $y-offset * -2, 0) rotate(270deg);
+          transition-delay: 0.075s;
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_elastic.scss

@@ -0,0 +1,41 @@
+@if index($hamburger-types, elastic) {
+  /*
+   * Elastic
+   */
+  .hamburger--elastic {
+    .hamburger-inner {
+      top: $hamburger-layer-height / 2;
+      transition-duration: 0.275s;
+      transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
+
+      &::before {
+        top: $hamburger-layer-height + $hamburger-layer-spacing;
+        transition: opacity 0.125s 0.275s ease;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height * 2) + ($hamburger-layer-spacing * 2);
+        transition: transform 0.275s cubic-bezier(0.68, -0.55, 0.265, 1.55);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        $y-offset: $hamburger-layer-spacing + $hamburger-layer-height;
+
+        transform: translate3d(0, $y-offset, 0) rotate(135deg);
+        transition-delay: 0.075s;
+
+        &::before {
+          transition-delay: 0s;
+          opacity: 0;
+        }
+
+        &::after {
+          transform: translate3d(0, $y-offset * -2, 0) rotate(-270deg);
+          transition-delay: 0.075s;
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_emphatic-r.scss

@@ -0,0 +1,53 @@
+@if index($hamburger-types, emphatic-r) {
+  /*
+   * Emphatic Reverse
+   */
+  .hamburger--emphatic-r {
+    overflow: hidden;
+
+    .hamburger-inner {
+      transition: background-color 0.125s 0.175s ease-in;
+
+      &::before {
+        left: 0;
+        transition: transform 0.125s cubic-bezier(0.6, 0.04, 0.98, 0.335),
+                    top 0.05s 0.125s linear,
+                    left 0.125s 0.175s ease-in;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height) + ($hamburger-layer-spacing);
+        right: 0;
+        transition: transform 0.125s cubic-bezier(0.6, 0.04, 0.98, 0.335),
+                    top 0.05s 0.125s linear,
+                    right 0.125s 0.175s ease-in;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transition-delay: 0s;
+        transition-timing-function: ease-out;
+        background-color: transparent !important;
+
+        &::before {
+          left: $hamburger-layer-width * -2;
+          top: $hamburger-layer-width * 2;
+          transform: translate3d($hamburger-layer-width * 2, $hamburger-layer-width * -2, 0) rotate(-45deg);
+          transition: left 0.125s ease-out,
+                      top 0.05s 0.125s linear,
+                      transform 0.125s 0.175s cubic-bezier(0.075, 0.82, 0.165, 1);
+        }
+
+        &::after {
+          right: $hamburger-layer-width * -2;
+          top: $hamburger-layer-width * 2;
+          transform: translate3d($hamburger-layer-width * -2, $hamburger-layer-width * -2, 0) rotate(45deg);
+          transition: right 0.125s ease-out,
+                      top 0.05s 0.125s linear,
+                      transform 0.125s 0.175s cubic-bezier(0.075, 0.82, 0.165, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_emphatic.scss

@@ -0,0 +1,53 @@
+@if index($hamburger-types, emphatic) {
+  /*
+   * Emphatic
+   */
+  .hamburger--emphatic {
+    overflow: hidden;
+
+    .hamburger-inner {
+      transition: background-color 0.125s 0.175s ease-in;
+
+      &::before {
+        left: 0;
+        transition: transform 0.125s cubic-bezier(0.6, 0.04, 0.98, 0.335),
+                    top 0.05s 0.125s linear,
+                    left 0.125s 0.175s ease-in;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height) + ($hamburger-layer-spacing);
+        right: 0;
+        transition: transform 0.125s cubic-bezier(0.6, 0.04, 0.98, 0.335),
+                    top 0.05s 0.125s linear,
+                    right 0.125s 0.175s ease-in;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transition-delay: 0s;
+        transition-timing-function: ease-out;
+        background-color: transparent !important;
+
+        &::before {
+          left: $hamburger-layer-width * -2;
+          top: $hamburger-layer-width * -2;
+          transform: translate3d($hamburger-layer-width * 2, $hamburger-layer-width * 2, 0) rotate(45deg);
+          transition: left 0.125s ease-out,
+                      top 0.05s 0.125s linear,
+                      transform 0.125s 0.175s cubic-bezier(0.075, 0.82, 0.165, 1);
+        }
+
+        &::after {
+          right: $hamburger-layer-width * -2;
+          top: $hamburger-layer-width * -2;
+          transform: translate3d($hamburger-layer-width * -2, $hamburger-layer-width * 2, 0) rotate(-45deg);
+          transition: right 0.125s ease-out,
+                      top 0.05s 0.125s linear,
+                      transform 0.125s 0.175s cubic-bezier(0.075, 0.82, 0.165, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_minus.scss

@@ -0,0 +1,34 @@
+@if index($hamburger-types, minus) {
+  /*
+   * Minus
+   */
+  .hamburger--minus {
+    .hamburger-inner {
+      &::before,
+      &::after {
+        transition: bottom 0.08s 0s ease-out,
+                    top 0.08s 0s ease-out,
+                    opacity 0s linear;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        &::before,
+        &::after {
+          opacity: 0;
+          transition: bottom 0.08s ease-out,
+                      top 0.08s ease-out,
+                      opacity 0s 0.08s linear;
+        }
+        &::before {
+          top: 0;
+        }
+
+        &::after {
+          bottom: 0;
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_slider-r.scss

@@ -0,0 +1,38 @@
+@if index($hamburger-types, slider-r) {
+  /*
+   * Slider Reverse
+   */
+  .hamburger--slider-r {
+    .hamburger-inner {
+      top: $hamburger-layer-height / 2;
+
+      &::before {
+        top: $hamburger-layer-height + $hamburger-layer-spacing;
+        transition-property: transform, opacity;
+        transition-timing-function: ease;
+        transition-duration: 0.15s;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height * 2) + ($hamburger-layer-spacing * 2);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        $y-offset: $hamburger-layer-spacing + $hamburger-layer-height;
+
+        transform: translate3d(0, $y-offset, 0) rotate(-45deg);
+
+        &::before {
+          transform: rotate(45deg) translate3d($hamburger-layer-width / 7, $hamburger-layer-spacing * -1, 0);
+          opacity: 0;
+        }
+
+        &::after {
+          transform: translate3d(0, $y-offset * -2, 0) rotate(90deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_slider.scss

@@ -0,0 +1,40 @@
+@use "sass:math";
+
+@if index($hamburger-types, slider) {
+  /*
+   * Slider
+   */
+  .hamburger--slider {
+    .hamburger-inner {
+      top: $hamburger-layer-height * 0.5;
+
+      &::before {
+        top: $hamburger-layer-height + $hamburger-layer-spacing;
+        transition-property: transform, opacity;
+        transition-timing-function: ease;
+        transition-duration: 0.15s;
+      }
+
+      &::after {
+        top: ($hamburger-layer-height * 2) + ($hamburger-layer-spacing * 2);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        $y-offset: $hamburger-layer-spacing + $hamburger-layer-height;
+
+        transform: translate3d(0, $y-offset, 0) rotate(45deg);
+
+        &::before {
+          transform: rotate(-45deg) translate3d(math.div($hamburger-layer-width, -7), $hamburger-layer-spacing * -1, 0);
+          opacity: 0;
+        }
+
+        &::after {
+          transform: translate3d(0, $y-offset * -2, 0) rotate(-90deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_spin-r.scss

@@ -0,0 +1,43 @@
+@if index($hamburger-types, spin-r) {
+  /*
+   * Spin Reverse
+   */
+  .hamburger--spin-r {
+    .hamburger-inner {
+      transition-duration: 0.22s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::before {
+        transition: top 0.1s 0.25s ease-in,
+                    opacity 0.1s ease-in;
+      }
+
+      &::after {
+        transition: bottom 0.1s 0.25s ease-in,
+                    transform 0.22s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(-225deg);
+        transition-delay: 0.12s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::before {
+          top: 0;
+          opacity: 0;
+          transition: top 0.1s ease-out,
+                      opacity 0.1s 0.12s ease-out;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(90deg);
+          transition: bottom 0.1s ease-out,
+                      transform 0.22s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_spin.scss

@@ -0,0 +1,43 @@
+@if index($hamburger-types, spin) {
+  /*
+   * Spin
+   */
+  .hamburger--spin {
+    .hamburger-inner {
+      transition-duration: 0.22s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::before {
+        transition: top 0.1s 0.25s ease-in,
+                    opacity 0.1s ease-in;
+      }
+
+      &::after {
+        transition: bottom 0.1s 0.25s ease-in,
+                    transform 0.22s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(225deg);
+        transition-delay: 0.12s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::before {
+          top: 0;
+          opacity: 0;
+          transition: top 0.1s ease-out,
+                      opacity 0.1s 0.12s ease-out;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(-90deg);
+          transition: bottom 0.1s ease-out,
+                      transform 0.22s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_spring-r.scss

@@ -0,0 +1,47 @@
+@if index($hamburger-types, spring-r) {
+  /*
+   * Spring Reverse
+   */
+  .hamburger--spring-r {
+    .hamburger-inner {
+      top: auto;
+      bottom: 0;
+      transition-duration: 0.13s;
+      transition-delay: 0s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::after {
+        top: ($hamburger-layer-spacing * 2 + $hamburger-layer-height * 2) * -1;
+        transition: top 0.2s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    opacity 0s linear;
+      }
+
+      &::before {
+        transition: top 0.1s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    transform 0.13s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: translate3d(0, ($hamburger-layer-spacing + $hamburger-layer-height) * -1, 0) rotate(-45deg);
+        transition-delay: 0.22s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::after {
+          top: 0;
+          opacity: 0;
+          transition: top 0.2s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      opacity 0s 0.22s linear;
+        }
+
+        &::before {
+          top: 0;
+          transform: rotate(90deg);
+          transition: top 0.1s 0.15s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      transform 0.13s 0.22s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_spring.scss

@@ -0,0 +1,44 @@
+@if index($hamburger-types, spring) {
+  /*
+   * Spring
+   */
+  .hamburger--spring {
+    .hamburger-inner {
+      top: $hamburger-layer-height / 2;
+      transition: background-color 0s 0.13s linear;
+
+      &::before {
+        top: $hamburger-layer-height + $hamburger-layer-spacing;
+        transition: top 0.1s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    transform 0.13s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+
+      &::after {
+        top: ($hamburger-layer-height * 2) + ($hamburger-layer-spacing * 2);
+        transition: top 0.2s 0.2s cubic-bezier(0.33333, 0.66667, 0.66667, 1),
+                    transform 0.13s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transition-delay: 0.22s;
+        background-color: transparent !important;
+
+        &::before {
+          top: 0;
+          transition: top 0.1s 0.15s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      transform 0.13s 0.22s cubic-bezier(0.215, 0.61, 0.355, 1);
+          transform: translate3d(0, $hamburger-layer-spacing + $hamburger-layer-height, 0) rotate(45deg);
+        }
+
+        &::after {
+          top: 0;
+          transition: top 0.2s cubic-bezier(0.33333, 0, 0.66667, 0.33333),
+                      transform 0.13s 0.22s cubic-bezier(0.215, 0.61, 0.355, 1);
+          transform: translate3d(0, $hamburger-layer-spacing + $hamburger-layer-height, 0) rotate(-45deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_squeeze.scss

@@ -0,0 +1,43 @@
+@if index($hamburger-types, squeeze) {
+  /*
+   * Squeeze
+   */
+  .hamburger--squeeze {
+    .hamburger-inner {
+      transition-duration: 0.075s;
+      transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
+
+      &::before {
+        transition: top 0.075s 0.12s ease,
+                    opacity 0.075s ease;
+      }
+
+      &::after {
+        transition: bottom 0.075s 0.12s ease,
+                    transform 0.075s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(45deg);
+        transition-delay: 0.12s;
+        transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
+
+        &::before {
+          top: 0;
+          opacity: 0;
+          transition: top 0.075s ease,
+                      opacity 0.075s 0.12s ease;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(-90deg);
+          transition: bottom 0.075s ease,
+                      transform 0.075s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_stand-r.scss

@@ -0,0 +1,45 @@
+@if index($hamburger-types, stand-r) {
+  /*
+   * Stand Reverse
+   */
+  .hamburger--stand-r {
+    .hamburger-inner {
+      transition: transform 0.075s 0.15s cubic-bezier(0.55, 0.055, 0.675, 0.19),
+                  background-color 0s 0.075s linear;
+
+      &::before {
+        transition: top 0.075s 0.075s ease-in,
+                    transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+
+      &::after {
+        transition: bottom 0.075s 0.075s ease-in,
+                    transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(-90deg);
+        background-color: transparent !important;
+
+        transition: transform 0.075s 0s cubic-bezier(0.215, 0.61, 0.355, 1),
+                    background-color 0s 0.15s linear;
+
+        &::before {
+          top: 0;
+          transform: rotate(-45deg);
+          transition: top 0.075s 0.1s ease-out,
+                      transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(45deg);
+          transition: bottom 0.075s 0.1s ease-out,
+                      transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_stand.scss

@@ -0,0 +1,45 @@
+@if index($hamburger-types, stand) {
+  /*
+   * Stand
+   */
+  .hamburger--stand {
+    .hamburger-inner {
+      transition: transform 0.075s 0.15s cubic-bezier(0.55, 0.055, 0.675, 0.19),
+                  background-color 0s 0.075s linear;
+
+      &::before {
+        transition: top 0.075s 0.075s ease-in,
+                    transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+
+      &::after {
+        transition: bottom 0.075s 0.075s ease-in,
+                    transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19);
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(90deg);
+        background-color: transparent !important;
+
+        transition: transform 0.075s 0s cubic-bezier(0.215, 0.61, 0.355, 1),
+                    background-color 0s 0.15s linear;
+
+        &::before {
+          top: 0;
+          transform: rotate(-45deg);
+          transition: top 0.075s 0.1s ease-out,
+                      transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(45deg);
+          transition: bottom 0.075s 0.1s ease-out,
+                      transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_vortex-r.scss

@@ -0,0 +1,48 @@
+@if index($hamburger-types, vortex-r) {
+  /*
+   * Vortex Reverse
+   */
+  .hamburger--vortex-r {
+    .hamburger-inner {
+      transition-duration: 0.2s;
+      transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
+
+      &::before,
+      &::after {
+        transition-duration: 0s;
+        transition-delay: 0.1s;
+        transition-timing-function: linear;
+      }
+
+      &::before {
+        transition-property: top, opacity;
+      }
+
+      &::after {
+        transition-property: bottom, transform;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(-765deg);
+        transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
+
+        &::before,
+        &::after {
+          transition-delay: 0s;
+        }
+
+        &::before {
+          top: 0;
+          opacity: 0;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(-90deg);
+        }
+      }
+    }
+  }
+}

_sass/libraries/hamburgers/types/_vortex.scss

@@ -0,0 +1,48 @@
+@if index($hamburger-types, vortex) {
+  /*
+   * Vortex
+   */
+  .hamburger--vortex {
+    .hamburger-inner {
+      transition-duration: 0.2s;
+      transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
+
+      &::before,
+      &::after {
+        transition-duration: 0s;
+        transition-delay: 0.1s;
+        transition-timing-function: linear;
+      }
+
+      &::before {
+        transition-property: top, opacity;
+      }
+
+      &::after {
+        transition-property: bottom, transform;
+      }
+    }
+
+    &.is-active {
+      .hamburger-inner {
+        transform: rotate(765deg);
+        transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
+
+        &::before,
+        &::after {
+          transition-delay: 0s;
+        }
+
+        &::before {
+          top: 0;
+          opacity: 0;
+        }
+
+        &::after {
+          bottom: 0;
+          transform: rotate(90deg);
+        }
+      }
+    }
+  }
+}